P0420 2006 Infiniti G35 Code - Catalyst System Efficiency Below Threshold Bank 1
Quick Answer
The Engine Control Module (ECM) monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor). Common causes include Faulty Three-way Catalyst Converter Bank 1, Exhaust Tube, Intake Air Leaks. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0420 2006 Infiniti G35 indicates Catalyst System Efficiency Below Threshold Bank 1.
- Common causes
- Common causes include Faulty Three-way Catalyst Converter Bank 1, Exhaust Tube, Intake Air Leaks.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0420 2006 Infiniti G35 Description
A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.
When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst malfunction is diagnosed.
What are the Possible Causes of the DTC P0420 2006 Infiniti G35?
- Faulty Three-way Catalyst Converter Bank 1
- Exhaust Tube
- Intake Air Leaks
- Faulty Oxygen (O2) Sensor
- Faulty Fuel injector(s)
- Leaking Fuel Injector (s)
- Faulty Spark plugs
- Improper Ignition Timing
- Faulty Engine Control Module (ECM)
- Dirty Air Filter
How to Fix the DTC P0420 2006 Infiniti G35?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0420 2006 Infiniti G35 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0420 2006 Infiniti G35 Code
1. What are the common symptoms of OBDII code P0420 on a 2006 Infiniti G35?
- Common symptoms include a noticeable decrease in fuel efficiency, the illumination of the check engine light, and a possible lack of engine power.
2. What does the OBDII code P0420 indicate on a 2006 Infiniti G35?
- P0420 indicates that the catalyst system efficiency on bank 1 is below the threshold, meaning the catalytic converter is not performing as expected.
3. What are the possible causes of OBDII code P0420 on a 2006 Infiniti G35?
- The common causes of P0420 include a faulty catalytic converter, oxygen sensor issues, exhaust leaks, engine misfires, or a faulty mass airflow sensor.
4. Can a bad oxygen sensor trigger OBDII code P0420 on a 2006 Infiniti G35?
- Yes, a malfunctioning oxygen sensor can lead to a P0420 code as it may provide incorrect data to the engine control module, impacting the catalytic converter's efficiency.
5. How can I diagnose the cause of OBDII code P0420 on my 2006 Infiniti G35?
- Diagnosis typically involves checking the oxygen sensors' readings, inspecting the catalytic converter for physical damage, and looking for exhaust leaks or other issues in the system.
6. Is it safe to continue driving with OBDII code P0420 on a 2006 Infiniti G35?
- It is generally not recommended to drive with a P0420 code as it can lead to further damage to the catalytic converter and potentially affect the vehicle's performance.
7. Are there any DIY repair tips for fixing OBDII code P0420 on a 2006 Infiniti G35?
- DIY repair options may include checking for exhaust leaks, replacing oxygen sensors, or cleaning the mass airflow sensor, but it's crucial to ensure proper diagnosis before attempting repairs.
8. How much does it typically cost to repair OBDII code P0420 on a 2006 Infiniti G35?
- The cost of repairing a P0420 code can vary depending on the underlying issue. Costs may range from a few hundred dollars for sensor replacement to over a thousand dollars for a new catalytic converter.
9. Can resetting the OBDII code P0420 on a 2006 Infiniti G35 make it go away permanently?
- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing P0420 is not addressed, the code is likely to reappear after some driving cycles.
10. How can I prevent OBDII code P0420 from reoccurring on my 2006 Infiniti G35?
- Regular maintenance, such as timely replacement of oxygen sensors, fixing engine misfires promptly, and using high-quality fuel, can help prevent the recurrence of P0420.
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